Machine for making paper boxes



Se tm; 1923. 1,467.0263.

. F. J. DOLAN Q MACHINE FOR MAKING PAPER BOXES Filed Sept. 30. 192?v SSheetsY-Sheetl A zwozma; BYQP J- lNVEN TORr- I Patented Sept. 4, 1923.

UNITED STATES PATENT OFFICE.

FRANK J. DOLAN, 0F BROOKLYN, NEW YORK, ASSIGNOR 710 JOSEPH M. PRICE, OF

NEW YORK, N. Y.

' MACHINE FOR MAKING PAPER BOXES.

Application filed September 30, 1922. Serial No. 591,466. I

To all whom it may concern Be it known that I, FRANK J. DOLAN, a citizen of the United States, residing at 1732 58th St, Brooklyn, in the county of Kings, State of New York, have invented certain new and useful Improvements in Machines for Making Paper Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same;

My invention is an improvement in paper box making machines, and relates particularly to machines for forming beads on the ends of tubular box elements. 7

In my prior applications, Serial No. 542,- 635, 542,636 and 549,686, I show and describe tubular boxelements, having at one or both ends inturned beads, providing abutments for engagement by other elements. Such box elements are usually cut in suitable lengths from formed composed of 9. strips. Usually the strips are three in numher, to provide a base or body, and inner and outer facings, and the strips are preferably so wound that the abutting edges of they several strips are in staggered relation. The entire wall of the element is turned to' pro vide the bead, thus dispensing with binding or finishing strips.

The usual methods and machines for forming beads do not operate satisfactorily on a finished element, because the facing strip is frequently broken or defaced, and the completed element is unsightly. Furthermore, to secure a bead that will not curl 01- warp away from the element wall, adhesives are used, which are not desirable, because their use increases the cost of the box, and adds to the unsightly appearance. In the present invention I provide a method and an apparatus for forming the bead, in such manner that the finishing or facing strip will not be broken or defaced,

and the bead will be firmly and securely united to the element wall, of an adhesive.

In the drawings:

Figure 1 is a side elevation of the improved machine,

without the use tubes, plurality of spirally wound and lowered on the frame.

In the embodiment of the invention a suitable support-- shownin the drawings, ing frame- 1 is provided, having adjustably mounted on one face thereof a bracket 2. This brwcketis adjustable vertically on the frame by means of avrack 3 rigid with the frame, and engaged by a pinion 4 secured to a shaft 5 journalled in the bracket. A,

hand wheel 6 is secured'to the shaft for operating the same, and it will be obvious that by turning the shaft 5 by means of the hand'wheel, the bracket may be raised A carriage 7 is mounted to slide on the bracket toward and from the frame, and the carriage carries a vertical bearing or hub 8, in which is held a hollow shaft or sleeve 9, and a solid shaft or rod 10, the shaft or rod being within the sleeve 9. The sleeve has secured to the upper end thereof a table 7, and the shaft or rod 10 extends above the table as shown in Figures 6 to 10. The rod 10 is vertically moved, but is normally pulled downward by coil-springsll, the said springs being arranged between the ends of a rod 12 extending transversely of the rod or shaft 10, and angle brackets 13 connected with the lower end of the hub 8.- The lower ends of the springs are connected with hook bolts 14, which pass through the angle brackets 13, and have nuts 15 threaded on them below the angle brackets. By means of the nuts the tension of the springs may be varied.

passing through a slot in the yoke body and engaging the hub, By loosening the screws,

the yoke may be adjusted vertically. The ends of the rod 12 extend through vertical slots in the sleeve 9, so that the sleeve does not interfere with the movement. of the rod, and the sleeve 9 is movable vertically in the hub, whereby to raise and lower, the table. This movement is obtained by a cam lever 19, which is pivoted at 20 to the bracket, and has one end extending between the angle brackets 13 and in position to engage beneath a screw 21 connecting with a head in the lower end of the sleeve. A ball 22 is journalled in the head of the screw and the ball engages the upper cam edge of the lever when the carriage is moved toward the frame, and the cam is so shaped that the table will be raised when the ball rolls upon the lever. By turning the screw 21, the ex tent of movement of the table may be varied. The carriage is moved by means .of a yoke 23 whose arms are pivoted to the ends of a lug 24 extending transversely of the carriage, and the said arms carry locking lugs 25 on their outer faces, which are adapted to engage behind catches 26 on the brackets to lock the carriage in inward position. To move the carriage, the yoke is lifted, so that the lugs 25 slide over the catches 26. yoke, the carriage may be moved outward,

and by reversing the movement, the car-' riage may be moved inwaro; and locked in inward position. The outer faces of the catches 26 are bevelled as shown in Figure 1, so that the locking lugs 25 will roll up and over the catches when the carriage is moved inward. The inward movement of the carriage is limited by a set screw 27, which is threaded into the inner end thereof, and engages the frame.

A former is mounted on the table, the said former being composed of a plurality of similar sections 28. Each of these 'sections, in the present instance, is quadrantal in form, and each section has a tongue 29 for engaging a recess 30 in the adjacent section. Each section is also provided with a depending pin 31engaging a radial slot in the table, and the sections are encircled by a thick band 33 of a resilient material, having a high coeflicient of friction, as for instance, rubber or the like. The upper end of the shaft or rod 10 has a frusto-conical head 34, which fits in recesses at the inner corners of the former sections, the said recesses cooperating to form a frusto-conical socket for receiving the head. 'It will be evident that when the head is moved downward with respect to the sectionsthe sections will be moved apart, and when the head is lifted the band 33 will collapse the sections. The box element to be beaded, indicated at 35, is placed on the former in the manner shown, and the former is of a depth such that the box wall extends well above By pulling outward on the the top of the former. The former is of such diameter that the tubular box element .will fit loosely thereover, when the former is collapsed, while the former will engage the element closely when it is expanded. The band having a high coeflicient of friction, prevents slipping of the band on the former, and also prevents slipping of the boxelement with respect to the band or former.

The bead indicated at 36 is formed on the box element, by means of a rotating head 37. This head is secured to the lower end of a shaft 38 journalled in bearings in arms 39 extended laterally from the frame 1, and the lower face of the head has anannular groove 39 of across section corresponding substantially to that of the bead to be formed. The outside diameter of the annular groove 39" is such that when the carriage 7 moves upward toward the head the outer face of the box element wall will on gage the outer wall of the groove. Continued upward movement will cause the wall to be gradually turned inward and downward, as shown in Figure 10, and the heat of the head, generated by friction, will mold the bead, softening the material of the wall, so that the bead is in efiect baked in the place, and there is no tendency' of the formed bead to warp or curl away from the box element wall.

The head is rotated from a shaft 40 journalled in the frame, and in a bearing arm the arms 39. This shaft is geared to the shaft 38 by a gearing 42, and the shaft 40 is driven from a suitable source of power, by means of a belt 43 engaging a pulley 44 on the erated by a cam 45. This cam is secured to a shaft 46 journalled in bearings 47 on the base of the frame 1, and driven from a shaft 48 journalled in the frame and a bearing 47 through a worm gear connection 49. The shaft 48 is driven by a belt 50 from the source of power, the belt engaging a pulley 51 on the shaft 48. A bar 52 is mounted to move vertically, the lower end being forked to engage the shaft 46, and the bar carries a roller 53 which engages in a face groove in the cam 45. The upper end of the bar 52 has a series of openings 54, to

a clutch indicated at 55. This clutch is any shaft 40. The cam lever 19 is op- I between the cam lever and operated by a treadle 56, which is normally held with the clutch in inoperative condition by means of a spring 57. When the free end of the treadle is depressed, the clutch is operated to connect the shaft 46 with the shaft 48. thereby to cause the cam lever 19 to be operated. The clutch is a trip-clutch, being automatically disconnected at the end of a complete rotation of the shaft 46. The sleeve 9 is prevented from rotation in the hub 8 by means of a key 58 secured to the hub and engaging a key-Way in the sleeve. The bracket 2 is held in adjusted position with respect to the frame 1, by means of screw bolts 59. These bolts extend through vertical slots in the frame 1, into engagement with the bracket. and when the screws are tightened the bracket is locked in adjusted position. Clamping plates 60 are arranged between the heads of the bolts and the'frame. I

he operation of the machine is as follows:

By means of the yoke 28, the carriage is pulled into the dotted line position of F igure 1. The former is at that time collapsed. in the position shown in Figures 6 and 7, the table 7 being in its lowest position, as shown in Figure 6. Abox element 85 may be dropped thereover. The carriage is then moved inwardly tothe'full line position of Figure 1, 'As the ball 22 rides upon the cam lever, the table is slightly lifted, moving into the position shown in Figure 8. The former is moved up'ward with respect to the head 34, and as a consequence the former sections are expanded, clamping the box element tightly. Meanwhile the head 37 is rotating continuously, and through previous operations it has become heated. In first starting the machine it may be advisable to heat the head, but after it has been in operation a while the frictiondeveloped heat is sufficient. The treadle is now operated to connect the shaft 46 with the shaft 48, and the cam lever 19 is operated to mote the table upwardly, that is, intothe position of Figure 10. This upward movement forms the bead, and the heated head softens and molds the paper, gradually bearing the same down into the head, so that there is no breaking or defacing of the facing of the wall. In addition the bead is firmly and securely united to'the box element wall by the heat and the friction. The sleeve 9 is limited in its downward movement by means of a collar 61 adjustably connected with the sleeve above the hub 8. The sleeve is threaded externally over a portion of its length for engagement by the collar, and by means of the v collar the table 7 may be nicely regulated so far as concerns its lowermost position.

I claim:

1. In box making machines, an expansible and contractible former, means for expanding the former, and a relatively thick band of resilient material having a high coeflicient of friction encircling the former to contract the same and to hold the box element from slipping on the former.

2. In boxmaking machines, a sectional former. means for. moving the former sections away from each other, and a relatively thick band of rubber encircling the sections for contracting the sections and for preventing the slipping of the box element on the former.

3. In box making machines, a former for engaging within one end of a tubular box element and a rotatable head having an annular groove of av diameter to receive the free end of the box to turn over the end of the element when the former is moved toward the head, said former being provided with means to increase its box-engaging pressure as it approaches said head.

4:. In box making machines, a former for engaging Within one end of a tubular box element and a rotatable head having an annular groove of a diameter to receive the free end of the box to turn over the end of the element when the former is moved toward the head, said head being of metal and adapted to be heated by the friction, said former being provided with means to increase its box-engaging pressure as it approaches said head.

5. In box making machines, an expansible and contractible former. a head above the former, said former being adapted to seat within one end'of a tubular box element, and the engagement by the end of the box element, and means controlled by the movement of the former toward and from the head for expanding and contracting the former.

6. In box making machines, a former adapted to seat within one end of a tubular box element, said former being expansible and contractible, a rotating lar groove for engagement by the end of the box element to bend over said end, said former being mounted to move toward and from the head, and means controlled by the movement of theformer toward and from the head for expanding and contracting the former, thereby to hold, and release the head of the box element.

7. In box making machines, a rotatable bead forming sible former tubular box and from the movement of the head for for engaging'one end of a element and movable toward head, means controlled by the the former toward and from expanding and collapsing the former, afixed support below. the head, and a carriage supporting the former and movable on the support into and out of alignment with the head.

8. In box making machines, a former for holding a box element, said former comprising a plurality of relatively movable elehead having an annular groove for head in align- .ment with the former and having an annuhead, a collapsible and expanments and resilient means to hold said elements in normal position, said resilient means also providing an engaging surface to hold said box element against slipping.

5 9. In box making machines, a former for holding a box element. said former comprising a plurality of relatively movable ele- FRANK J. DOLAN. 

